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With Sheldon rattled after meeting Dennis, a teen physicist who's smarter than he is, the rest of the guys search for a way to eliminate the threat.

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

When the delivery of a full-size prop of 1960's 'The Time Machine' causes Penny to miss work, she scolds Leonard about his sci-fi collectibles.

A Will And A Dead Man's Wife. Georgie's not ready for his mother to start dating again. Meanwhile, Jim and Audrey struggle to make their wills.

Georgie and Ruben get their hands dirty when Fred Fagenbacher tries to run them out of business. Meanwhile, Mandy grows suspicious of Georgie's lies.

Roisin and Sara explore Bergen and Voss on a budget, dining at a Norwegian buffet, playing black metal and canoeing to find rubbish on a fjord.

A moronic mob bagman, his noisy girlfriend, and a closeted gay hit man all collide on a trip to Mexico to recover a supposedly cursed gun.

Roisin and Sara explore Bergen and Voss on a budget, dining at a Norwegian buffet, playing black metal and canoeing to find rubbish on a fjord.

With the Coopers facing judgement from the congregation in the wake of Georgie's pregnancy, Sheldon is distracted by the family drama.

Blingy bride Lucille arrives in love with a satin dress. Plus, spicy bride Joan loves a dress from her hometown but arrives wanting one no one else can get.

When Angela's family is unable to join her on her weight-loss journey, she reaches out to an old love, who is willing to go to Texas with her.

Fashionista Katie and tomboy Yazmin are marrying each other and both looking for dresses! Jasmine is anxious to cover her cleavage - will she dare to bare.

Bride Abigail and her entourage are drawn to the sparkliest gowns in the shop! But, will her budget allow for extreme bling? And, Léah seeks a quirky fitted gown.

Bride Alis likes fishtail frocks, but her mum is set on a princess look. Can David break the deadlock? After trying over 30 dresses Lyndsey's brought her friends for help.

When his car breaks down, Mike is forced to decide whether or not to accept a loan from Carl to fix it.

Late at night, Molly catches Carl coming out of Victoria's room, leaving her questioning whether or not she will tell Mike.

Mike wants Peggy to see a doctor after her bathtub falls through the ceiling.

George and Mary insist on meeting the new woman in Georgie's life, while Sheldon and Missy have suspicions about what's going on with their family.

Despite the whole family trying to keep it a secret, Sheldon and Missy learn about Georgie's pregnancy.

With the Coopers facing judgement from the congregation in the wake of Georgie's pregnancy, Sheldon is distracted by the family drama.

When Wolowitz goes AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

Raj's parents set him up on a blind date, and when he discovers he can talk to her, she shows interest in Sheldon.

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard.

Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent. However, Sheldon's lie becomes a bit too complicated.

With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

With Sheldon rattled after meeting Dennis, a teen physicist who's smarter than he is, the rest of the guys search for a way to eliminate the threat.

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

When the delivery of a full-size prop of 1960's 'The Time Machine' causes Penny to miss work, she scolds Leonard about his sci-fi collectibles.

Molly gets accepted into an elite eight-week writer's workshop in Iowa but faces a big decision when Mike asks her not to go.

Molly returns home after eight weeks at a writing workshop with great news: she's getting published and scored a big book advance.

Molly comes down with a case of writer's block. If she doesn't shake it fast, she'll be in danger of losing her big advance.

Sheldon struggles with the first signs of puberty while his parents hunt for new jobs, and Georgie and Meemaw take a business trip across the border.

Nine-year-old Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

To appease his worried mother, Sheldon employs the techniques of a self-help book to try and make a friend.

The gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll decide who can date her.

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

Penny's breakup spurs Leonard to summon the courage to ask her out, and they both go to Sheldon for advice on their upcoming date.

Penny opens up to Sheldon after a less-than-stellar first date with Leonard, placing him in the uncomfortable position of having to keep a secret.

Seeing Penny with another guy sends Leonard back to Leslie Winkle, much to Sheldon's dismay.

Penny becomes addicted to an online game based on the world of Conan the Barbarian and persistently pesters Sheldon for advice.

Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

An intervention is used to try to force Sheldon to overcome his fear of driving.

Dara Ó Briain introduces topical chat and hilarious games with guests Rhys James, Ahir Shah, Angela Barnes, Lou Sanders, Ed Byrne and Milton Jones.

Roisin and Sara explore Bergen and Voss on a budget, dining at a Norwegian buffet, playing black metal and canoeing to find rubbish on a fjord.

Lisa fears the horn growing out of the back of her head could be cancer. Chuck has a Popeye-shaped bump on his arm, and two teen brothers have matching lumps.

Cedric has a bump on his eye and a lump on his neck that stops him from working. Katherine's ear cluster puts her neighbourhood watch job at risk.

Jimmy wants his alligator skin cured so he can find love. Djuka is a stubborn guy with a stubborn bump. Talina has hundreds of tumours on her body.

Bed-bound for two years, Lashanta relies on her kids to clean and feed her. She wants to join Dr. Now's programme but needs help to leave the house.

Bride Jackie is confused about what dress she wants, all she knows is that she wants bling. Plus, Gemma returns to try on her dress, but she can't get into it.

Bride Kerri already bought one dress but now she hates it, so David has his work cut out trying to find a new one. And, Hannah thinks she's made a big mistake.

Traditional. Grace has her heart set on a simple lace dress, but her best friend thinks she should go for slinky and sparkly. Plus, Jenny has to make a quick decision.

Sophie is keen to hide her bum in an A-line dress, but her entourage think she should show it off. And, new mum Claire wants to hide her mummy tummy.

Molly gets accepted into an elite eight-week writer's workshop in Iowa but faces a big decision when Mike asks her not to go.

Molly returns home after eight weeks at a writing workshop with great news: she's getting published and scored a big book advance.

Molly comes down with a case of writer's block. If she doesn't shake it fast, she'll be in danger of losing her big advance.

Sheldon struggles with the first signs of puberty while his parents hunt for new jobs, and Georgie and Meemaw take a business trip across the border.

Nine-year-old Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

To appease his worried mother, Sheldon employs the techniques of a self-help book to try and make a friend.

The gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll decide who can date her.

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

Penny's breakup spurs Leonard to summon the courage to ask her out, and they both go to Sheldon for advice on their upcoming date.

Penny opens up to Sheldon after a less-than-stellar first date with Leonard, placing him in the uncomfortable position of having to keep a secret.

Seeing Penny with another guy sends Leonard back to Leslie Winkle, much to Sheldon's dismay.

Penny becomes addicted to an online game based on the world of Conan the Barbarian and persistently pesters Sheldon for advice.

Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

An intervention is used to try to force Sheldon to overcome his fear of driving.

'Tis The Season To Be Molly. Mike assures Molly he'll be home in time for Christmas Eve dinner until he and Carl end up in the back of a stolen truck.

Mike thinks Carl is out of line when he invites Victoria to go on what is supposed to be a men-only fishing trip.

Molly's constant rewrites on her book begin to irritate Mike and the family and leave them wondering if the end is anywhere in sight.

When George Sr. is rushed to the emergency room, Meemaw comes to babysit. And the kids have an adventure getting to the hospital on their own.

Sheldon refuses to eat solid food after a choking scare but finds solace in a new interest after he discovers comic books.

A Solar Calculator, A Game Ball. Sheldon uses his statistics skills to help his father coach the football team. Both Sheldon and Georgie struggle with the popularity this brings.

Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

It's an awkward showdown at Coyote Pass with Kody, Robyn, Janelle, and Meri. Kody considers therapy to help repair relationships with his children.

Meri ventures out of her comfort zone and attends a dating event. Kody owns up to his bad behaviour and decides to apologize to each of his ex-wives.

Dennis has several giant growths on his head. Juan has a rare condition he hopes Dr. Lee will understand. Natalie is covered in hundreds of mysterious dark bumps.

Brittney has hundreds of tiny bumps over her chest that have destroyed her confidence. John has a nose the size of a plum. Dr. Lee's friend drops in.

Mike's religious beliefs have kept him from seeing a doctor about his huge growth. Plus, Kylie debates whether to remove her birthmark.

Having spent the last two years in his bed due to his weight, Cillas' food addiction prevents him from being there for his fiancée and her three daughters.

Bride Lisa wants a dress that will show off her butterfly tattoo. Plus, Ashley has lost four stone and is looking for a fitted gown to emphasise her new figure.

Amber always dreamed of being a princess on her wedding day, but her strict budget may restrict her. Tori thought she wanted a big gown, until she tries a fishtail.

Karlie is hoping to find an even better dress than one she found at another bridal store. Plus, Lauren hasn't seen her dress for six months, will she still like it.

Yvonne is looking for a mermaid-style dress, but her mum insists on a ball gown. Plus, Natalie is back for her fitting, but she's been keeping a big secret.

'Tis The Season To Be Molly. Mike assures Molly he'll be home in time for Christmas Eve dinner until he and Carl end up in the back of a stolen truck.

Mike thinks Carl is out of line when he invites Victoria to go on what is supposed to be a men-only fishing trip.

Molly's constant rewrites on her book begin to irritate Mike and the family and leave them wondering if the end is anywhere in sight.

When George Sr. is rushed to the emergency room, Meemaw comes to babysit. And the kids have an adventure getting to the hospital on their own.

Sheldon refuses to eat solid food after a choking scare but finds solace in a new interest after he discovers comic books.

A Solar Calculator, A Game Ball. Sheldon uses his statistics skills to help his father coach the football team. Both Sheldon and Georgie struggle with the popularity this brings.

Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

Mike engages in a little innocent flirting with a rookie policewoman and then begins to feel guilty when she reciprocates.

Samuel contemplates moving back to Africa when he receives a letter from his parents saying they're struggling financially.

When Molly learns it's been more than ten years since her husband's seen a doctor, she badgers a reluctant Mike to get checked out.

A Patch, A Modem And A Zantac. After being dismissed in class, Sheldon is determined to prove a visiting NASA representative wrong and starts studying theoretical physics.

A Brisket, Voodoo And Cannonball Run. Meemaw refuses to give George Sr. her brisket recipe. The kids try to think of ways to resolve this family feud.

George takes his sons to see a space shuttle launch. Meanwhile, Mary, Meemaw and Missy have a girl's night at the salon.

When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

A visit from Leonard's mother ends up bringing him and Penny closer.

Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up. Sheldon locks himself out and has only one other place to stay: Penny's.

Dr. Lee meets Stephanie, who has a giant baseball-sized scalp bump. Plus, Wesley believes that a pencil lead is embedded in his palm.

Firefighter Jimmy has numerous torso bumps that make it painful to play with his young son. Plus, Steven has a mystery bump on the back of his head.

Mic Drop Pop! Josh has a large knot on his head sustained from a car crash 18 years ago. Brittney is covered in mysterious bumps. TJ has a curious lump protruding from his side.

Tyler's hands are so cracked and painful that he considers getting them amputated. And Ebonee covers the tiny bumps around her eyes with sunglasses.

Erica stabbed her hand with a pencil 45 years ago and believes the lead remains trapped in her palm. Paula's swollen feet emit a foul odour.

With severe lymphedema Mercedes can barely stand, and her family helps her care for her young kids. To successfully lose weight she must confront her past trauma.

Michelle is looking for a sexy, fitted dress but her father wants her in a princess style. Plus, Lisa's mum and sister haven't liked any dresses so far, will her dad.

After trying on around 70 dresses, Taylor is still confused about what to wear on her special day. Plus, Elizabeth thinks she wants a mermaid-style dress.

Ellie's fiancé wants strapless but her mum wants backless. She can't have both so what's a bride to do? Joanne reveals her dress to her mum for the first time.

Mike engages in a little innocent flirting with a rookie policewoman and then begins to feel guilty when she reciprocates.

Samuel contemplates moving back to Africa when he receives a letter from his parents saying they're struggling financially.

When Molly learns it's been more than ten years since her husband's seen a doctor, she badgers a reluctant Mike to get checked out.

A Patch, A Modem And A Zantac. After being dismissed in class, Sheldon is determined to prove a visiting NASA representative wrong and starts studying theoretical physics.

A Brisket, Voodoo And Cannonball Run. Meemaw refuses to give George Sr. her brisket recipe. The kids try to think of ways to resolve this family feud.

George takes his sons to see a space shuttle launch. Meanwhile, Mary, Meemaw and Missy have a girl's night at the salon.

When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

A visit from Leonard's mother ends up bringing him and Penny closer.

Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up. Sheldon locks himself out and has only one other place to stay: Penny's.

Molly runs into a roadblock in the form of her publisher, who wants her to make a provocative rewrite in a section of her book.

When Joyce refuses to take a breathalyser test at a DUI checkpoint, Mike is forced to arrest her.

The prospect of an empty house for the weekend has Mike and Molly in a state of excitement.

George Sr. makes a deal with Sheldon to tutor his brother when Georgie's poor grades threaten his place on the football team.

Sheldon interviews with a school for gifted children. Much to their surprise, the rest of the family struggle with his absence.

A worried Mary sends Sheldon to Sunday school after she finds him playing Dungeons & Dragons with Tam and Billy.

Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.

The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.

Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behaviour modification experiment on Penny.

Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Howard becomes a third wheel to Leonard and Penny.

Sheldon looks forward to squaring off against a Star Trek actor in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard.

Hoping to fit in with Penny's football-loving friends, Leonard gets tutored in the sport by Sheldon. Raj is furious over the loss of his patang.

Leonard and Penny's first big fight sees Sheldon playing mediator due to childhood trauma that means he can't be around loud verbal conflicts.

With the rest of the gang off on a desert camping trip, Sheldon must play hero after Penny slips in the tub and dislocates her shoulder.

A moronic mob bagman, his noisy girlfriend, and a closeted gay hit man all collide on a trip to Mexico to recover a supposedly cursed gun.